Chemical Imaging of the Spatial Distribution and Interactions of Tannin Dispersal in Bioplastic Systems
IR chemical imaging has been used to characterise the dispersion of condensed tannin additives in a biodegradable plastic, poly(butylene succinate). By mapping key FTIR absorptions, acetylated tannin was found to remain in discrete aggregates, though the outer of these particles contained a mixed phase with PBS. In particles >100 μm, PBS does not appear to ingress the tannin core, only wetting the outer region. Analysis of a second tannin derivative indicated that there was a more uniform dispersion of the additive in the PBS matrix.
Deliang Zhang, Kim Pickering, Brian Gabbitas, Peng Cao, Alan Langdon, Rob Torrens and Johan Verbeek
M. Gaugler et al., "Chemical Imaging of the Spatial Distribution and Interactions of Tannin Dispersal in Bioplastic Systems", Advanced Materials Research, Vols. 29-30, pp. 173-176, 2007